Thomas k



T. K. ANDERSON Damper. I

Patented June 8, 1869.

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Letters Patent No. 90,912, dated June 8, 1869.

STOVE-PIPE DAMPER The Schedule referred to in these Letters Patent and making part of the same.

To all whom it mag concern:

Be it known that I, Tnomls K. Annnnsox, of H01- nellsville, in the county of Steuben, and State of New York, have invented certain new and useful Improve-- ments in Self-Acting and Self-Regulating Stove-Pipe Dampers and Draught-Regulators; and the following- -is a full, clear, and exact description of the same, reference being bad to the accompanying drawings, making a part of this specification, in.which- Figure 1 represents a vertical section through a joint of a stove-pipe with the draught-regulating apparatus attached.

Figure 2 shows the mode of constructing the expanding metal plate bar which operates the damper.

Figure 3 is a flat View of the oval damper-plate, with the pivot-wires, showing the mode of inserting it, and securing it in the stove-pipe, so as to operate easily.

The object of my invention .is to make the heat radiated from the stove and pipe a perfect self-acting regulator of the draught of the stove; and

It consists in the construction of the expanding the pipe, A, I place an oval damper, B, in the centre of which is secured a tube, 1), that forms the sockets, in

which the pins a a are inserted from the opposite sides of the stove-pipe, to form the hinge on whiehit turns to operate;

The portion forming the lower edge is provided with a slight weight, g so that the plate B will have the ten-' dency to remain in a vertical position.

A short distance from the centre, above the tube 1), is made a small opening, (I, through the damper-plate B, to allow the escape of gas when the damper is closed.

Across the opening d is secured a rod, 0, to which the connecting-rod F is attached, which rod extends horizontally out through one side of the pipe A, and

through holes in the upper end of the double platemetal strap D, and is provided with a graduated scale, j; and a friction-slide, E, so that by it the damperplate B may be placed at any desired angle in the pipe before the fire in the stove is built, to give it, on the start, more or less draught, as may be desired.

The friction-slide E may be moved out on the scalerod 1', so that the damper B will not be operated by the heat, or it can be moved up, so as to hold the damper closed.

The expanding double plate-metal strap D, which operates the closing and opening of the space in the stove-pipe or fine automatically by the action of more or less fire and heat in the stove, I construct in the following manner:

I take thin Russia sheet or American glazed iron, of a suitable length and width, and serrate both edges the greater portion of the whole length. I then take a strip of line hard-rolled brass, which may be somewhat thicker than the sheet-iron, the brass, D, being about the same length, but suflicicntly narrow to allow the serrated edges t i 'i 2' 'i to turn over and clinch on it, and the ends firmly secured together by folding over the iron on to the brass strip, so that when the brass expands by the heat, the ends being confined in the sheet-iron strip, it bends the whole outward from the pipe A sufficiently to close the damper B, and thereby shut ed the rarefied air from passing oii' with rapidity through the pipe.

The expanding or compensating strap D is secured firmly to the pipe A by a bolt or screw, 1, at the lower end, so that all the power and motion are applied and act directly on the damper.

What I claim as my invention, and desire to secure by Letters Patent, is

The combination of the oval damper B, connectingrod 1*, slide E, or its equivalent-,with the compensating strap l), as described, when arranged to operate in the manner substantially as herein set fortln In testimony whereof, I hereunto subscribe my name, in the presence oi'- THOMAS K. ANDERSON.

Witnesses:

Enivr. F. Bnowu, J B. Woonnnrn, 

